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AP15421 (11/09)

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FOR YOUR SAFETY!

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 Do not store or use gasoline or other 
flammable vapors or liquids or other 
combustible materials in the vicinity of 
this or any other appliance. To do so may 
result in an explosion or fire.

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WHAT TO DO IF YOU SMELL GAS

 

 

Do not try to light any appliance.

   

 

Do not touch any electrical switch; do not 

use any phone in your building.

   

 

Immediately call your gas supplier 

from a neighbor’s phone. Follow the 
gas supplier’s instructions.

 

 

If you cannot reach your gas supplier, call 

the fire department.

 

 

Do not return to your home until authorized 

by the gas supplier or fire department.

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Improper installation, adjustment, 
alteration, service or maintenance can cause 
property damage, personal injury or death. 
Refer to this manual. Installation and service 
must be performed by a qualified installer, 
service agency or the gas supplier.

 

WARNING:  If the information in these instructions is not followed exactly, 
a fire or explosion may result, causing property damage, personal injury or death.

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The purpose of this manual is twofold: one, to provide the installer with 
the basic directions and recommendations for the proper installation 
and adjustment of the water heater; and two, to the owner–operator, 
to explain the features, operation, safety precautions, maintenance and 
troubleshooting of the water heater. This manual also includes a parts 
list.

It is very important that all persons who are expected to install, operate 
or adjust this water heater read the instructions carefully so they may 
understand how to perform these operations. If you don’t understand 
these instructions or any terms within it, seek professional advice.

Any questions regarding the operation, maintenance, service or warranty 
of this water heater should be directed to the seller from whom it was 
purchased. If additional information is required, refer to the section on 
If You Need Service.

Do not destroy this manual. Please read carefully and keep in a safe 
place for future reference.

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Recognize this symbol as an indication of Important Safety 
Information!

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California Proposition 65 Warning:

 

This product contains 

chemicals known to the State of California to cause cancer, birth 
defects or other reproductive harm.

Use & Care Manual

With Installation Instructions for the Installer

Tankless 

Water Heater

DESIGN

CERTIFIED

®

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Warning: This water heater is not suitable 

for use in manufactured (mobile) homes!

Direct Vent Gas

CERTIFIED

R

31-93681-00

Models
PH2-20R DVSN (Natural Gas); PH2-20R DVSP (L.P. Gas)
PH2-25R DVSN (Natural Gas); PH2-25R DVSP (L.P. Gas)
PH2-28R DVSN (Natural Gas); PH2-28R DVSP (L.P. Gas)

Summary of Contents for PH2-20R DVSN (Natural Gas)

Page 1: ... two to the owner operator to explain the features operation safety precautions maintenance and troubleshooting of the water heater This manual also includes a parts list It is very important that all persons who are expected to install operate or adjust this water heater read the instructions carefully so they may understand how to perform these operations If you don t understand these instructio...

Page 2: ...ey over the life of your water heater You ll find many answers to common problems in the Troubleshooting Guide If you review the chart of Troubleshooting Tips first you may not need to call for service READ THIS MANUAL Your safety and the safety of others are very important There are many important safety messages in this manual and on your appliance Always read and obey all safety messages This i...

Page 3: ...aterials and liquids which include but are not limited to adhesives solvents paint thinners etc and the vapors they produce are extremely dangerous DO NOT handle use or store gasoline or other flammable or combustible materials anywhere near or in the vicinity of a water heater or any other appliance Be sure to read and follow the labels on the water heater as well as the warnings printed in this ...

Page 4: ... achieved with the Bath USC 117 or USC2 117 remote control Only qualified service personnel should perform this adjustment Only factory authorized remote control s should be used Notice When this water heater is supplying general purpose hot water requirements for use by individuals a thermostatically controlled mixing valve for reducing point of use water temperature is recommended to reduce the ...

Page 5: ...ne or LP gas must be used with great caution It is heavier than air and will collect first in lower areas making it hard to detect at nose level Before attempting to light the water heater make sure to look and smell for gas leaks Use a soapy solution to check all gas fittings and connections Bubbling at a connection indicates a leak that must be corrected When smelling to detect a gas leak be sur...

Page 6: ...ential water heaters of a capacity greater than 52 gallons or tankless style consult the local building jurisdiction code for acceptable bracing procedures Have the installer show you the location of the gas shut off valve and how to shut it off if necessary Turn off the manual shut off valve if the water heater has been subjected to overheating fire flood physical damage or if the gas supply fail...

Page 7: ... be installed as close as practical to the vent termination to minimize vent length and the number of elbows required for venting The water heater should be installed with the proper venting materials and termination suitable for Category III venting or Rheem approved venting A fire stop plate should be installed at every penetration of a floor or ceiling if the vent is not running in a fire rated...

Page 8: ...thorized by the gas supplier or fire department Improper installation adjustment alteration service or maintenance can cause property damage personal injury or death Refer to this manual Installation and service must be performed by a qualified installer service agency or the gas supplier WARNING If the information in these instructions is not followed exactly a fire or explosion may result causin...

Page 9: ...pliance vent adapter and properly vent the water heater to the outdoors as outlined in the Venting section of this manual will result in unsafe operation of the water heater causing death serious injury explosion or fire To avoid the risk of fire explosion or asphyxiation from carbon monoxide NEVER operate the water heater unless it is properly vented and has adequate air supply for proper operati...

Page 10: ...in hose to the drain fitting and plumb the hose to a sanitary sewer drain See Examples A and B on pages 13 and 14 for DOWNWARD and UPWARD slope for horizontally vented water heaters When a water heater is vented vertically an UPWARD slope must always be used See the diagram on page 14 showing UPWARD slope for vertically vented water heaters Always attach a drain hose to the drain fitting and plumb...

Page 11: ...g or other appliance 6 inches 15 cm for appliances 10 000 Btuh 3 kW 12 inches 30 cm for appliances 10 000 Btuh 3kW and 100 000 Btuh 30kW 36 inches 91 cm for appliances 100 000 Btuh 30kW 6 inches 15 cm for appliances 10 000 Btuh 3 kW 9 inches 23 cm for appliances 10 000 Btuh 3kW and 50 000 Btuh 15kW 12 inches 30 cm for appliances 50 000 Btuh 15kW K Clearance to mechanical air supply inlet 6 feet 1 ...

Page 12: ...gainst accidental contact with people and pets Indoor Water Heater 12 WARNING Moisture in the flue gas will condense as it leaves the vent terminal In cold weather this condensate can freeze on the exterior wall under the eaves and on surrounding objects Some discoloration to the exterior of the building is to be expected However improper location or installation can result in severe damage to the...

Page 13: ...and center mark this location If the heater is below the vent exit remove it from the wall and place it in a safe area while the vent opening is made Create a 6 diameter hole to allow the vent to pass without deformation or resistance Clean debris from the opening and hang the heater and secure all four mounting screws Dry fit the entire vent system from the heater to the vent termination includin...

Page 14: ...arance to Combustibles Firestop Firestop Support Plate Adjustable Roof Flashing Concentric Vent Pipe has 0 Clearance Requirment Storm Collar Support Clamp 1 4 per foot upward slope on horizontal run Vertical Termination Air Intake 3 5 Concentric Pipe Condensate Drain Line Form a Trap in the drain line To Drain Dispose of condensate in accordance to local codes Support Hanger Vertical Vent Installa...

Page 15: ... should be followed Operation of the water heater requires the minimum water pressure of 14 psi 97 kPa and a minimum water flow rate of 0 66 gpm 2 5 lpm A water pressure of 40 psi 276 kPa is required to achieve maximum flow rate To maintain proper performance ensure sufficient water supply pressure The Required Water Pressure Min Operating Water Pressure 14 psi 97 kPa Pipe Pressure Loss Faucet and...

Page 16: ...Check Valve between the water heater and the water shutoff valve if either a thermal expansion tank or a backflow prevention device is not installed The following should be addressed in regards to the HOT WATER OUTLET Connections between the water heater and point s of use should be as short and direct as possible Local codes shall govern the exact type of pipe material to be used for water connec...

Page 17: ...d be installed in the discharge line Notice Local codes govern the installation of relief valves If local codes require that a temperature and pressure relief valve should be installed the manufacturer recommends a type 40XL Watts T P relief valve or an equivalent model be used Notice Manual operation of relief valves should be performed at least once a year Turn off the electrical power and gas s...

Page 18: ...ed at the bottom of the gas line Do not use excessive force over 31 5 ft lbs 42 7 Nm in tightening the pipe particularly if teflon pipe compound is used as the unit may be damaged The inlet gas pressure to the water heater must not exceed 10 5 w c 2 6 kPa for natural or 14 w c 3 5 kPa for LP gas For purposes of input adjustment the minimum inlet gas pressure with main burner on is shown on the wat...

Page 19: ... Field wiring connections and electrical grounding must comply with local codes or in the absence of local codes with the latest edition of the National Electrical Code ANSI NFPA 70 or in Canada Canadian Electrical Code CSA C22 1 Part 1 F PRIORITY POWER ON OFF MAIN Control Base Plate Control screw Mounting Screw x 2 19 NOTICE If a manifold system is installed the main remote control connected to t...

Page 20: ...mote control over the base plate Ensure the projections in the base plate fit into the housings in the remote control Fix the control to the base plate at the bottom of the remote control using the screw provided Proceed to Connecting the remote control to the water heater to complete installation Connecting the remote control to the water heater Ensure that the power to the water heater has been ...

Page 21: ...Y GREEN YELLOW AC 120V O ORANGE ORANGE CODE DE COULEUR COLOR CODE MIN BUTTON BOUTON MIN G YorG W BOUTON MAX BL BL BL LED G G MAX BUTTON ADJUSTER BUTTON BL BOUTON DE RÉGLAGE BL 1 2 3 4 5 A FOR INDOOR DIRECT VENT MODEL ONLY POUR MODÈLE INTÉRIEUR À ÉVENT DIRECT SEULEMENT 4 3 2 1 Y W R BK BL W BL R O Y FOR DIRECT VENT MODEL ONLY POUR MODÈLE À ÉVENT DIRECT SEULEMENT SW3 SW2 SW1 U 2 1 S 1 3 2 W W 1 2 3 ...

Page 22: ... Line Shut off V alve Union Cap Condensate Drain Line to Suitable Drain NOTICE The National Fuel Gas Code NFGC and B149 mandates a manual gas shut off valve See NFGC B149 for complete instructions Local codes or plumbing authority requirements may vary from the instructions or diagrams provided and take precedent over these instructions Vacuum Relief Valve Not Supplied If required install per loca...

Page 23: ...h storage tank heaters This water heater does not store water making an insulation blanket unnecessary The manufacturer s warranty does not cover any damage or defect caused by installation attachment or use of any type of energy saving or other unapproved devices other than those authorized by the manufacturer into onto or in conjunction with the water heater The use of unauthorized energy saving...

Page 24: ...s rating plate Gas supply pressure is sufficient for the water heater Gas line equipped with shut off valve union and sediment trap Approved pipe joint compound used Soap and water solution used to check all connections and fittings for possible gas leak Gas Company inspected installation if required D Relief Valve Pressure Relief Valve properly installed and discharge line run to open drain Disch...

Page 25: ...is label 2 Turn off all electric power to the appliance 3 Do not attempt to light the burner by hand 4 Turn the Gas Shutoff Valve located on the outside of the unit clockwise to the OFF position 5 Wait five 5 minutes to clear out any gas If you then smell gas STOP Follow B in the safety information above on this label If you don t smell gas go to the next step 6 Turn the Gas Shutoff Valve located ...

Page 26: ...as to the water heater If there is any difficulty in understanding or following the Operating Instructions or the Care and Cleaning section it is recommended that a qualified person or serviceman perform the work Operating the water heater DANGER There is a hot water scald potential if the temperature is set too high Households with small children disabled or elderly persons may require a 120 F 49...

Page 27: ...emember that hotter water increases the risk of scald injury Always supervise young children or others who are incapacitated The water heater is equipped with a device that will shut off the gas supply to the burner if the water heater exceeds normal operating temperatures Refer to the Before You Call For Service section located near the back of this manual or contact your dealer WARNING Should ov...

Page 28: ... the hot water heater discharges periodically this may be due to a problem in the water system Contact the water supplier or your plumbing contractor on how to correct this DO NOT plug the relief valve outlet Rapid closing of faucets or solenoid valves in automatic water using appliances can cause a banging noise heard in a water pipe Strategically located risers in the water pipe system or water ...

Page 29: ...n the left for location of sight glass If any unusual burner operation is noted the water heater should be shut off until qualified service assistance can be obtained CAUTION For your safety burner inspection and cleaning should be performed only by qualified service personnel For cleaning a vacuum cleaner can be used on the burner If the water heater is to remain idle for an extended period of ti...

Page 30: ...ns can occur from down draft of venting system or from installation in areas exposed to cold air The water heater is equipped with a Freeze Protection Electric Heater As long as electricity is supplied to the water heater it prevents freezing inside the water heater down to an ambient temperature of approximately minus 30 F 34 C without wind conditions This device only protects the internal compon...

Page 31: ...g Valve Malfunctions if applicable Check and replace if necessary Error code displayed on remote control See instructions for Error Code and if required contact a dealer for service Not enough water demand Increase water flow Water inlet filter clogged Clean water inlet filter Fixture aerator is clogged Clean aerator Scale buildup in heat exchanger Check for error code If required contact a dealer...

Page 32: ...er safety devices Refer repairs to qualified service personnel CAUTION Make certain power to water heater is OFF before removing protective cover FOR ANY REASON CAUTION Label all wires prior to disconnection when servicing controls Wiring errors can cause improper and dangerous operation VERIFY PROPER OPERATION AFTER SERVICING 32 Error Code Possible Cause What To Do 11 The Gas Shutoff Valve is not...

Page 33: ...rical wiring gas piping burners vent connectors or other safety devices Refer repairs to qualified service personnel WARNING For your safety DO NOT attempt to disassemble this unit for any reason Front View Unit Cover View Side View Heat Transfer Pipe Heat Exchanger Assy Electrode Ignitor Gas Valve Assy Gas Supply Cold Water Supply Water Flow Solenoid Drain Plug Circuit Board Blower Motor Flame Ro...

Page 34: ...F 38 C or 85 F 29 C Press and hold the Down button on the remote control for more than 5 seconds Number on the display of the remote control will begin to blink While the number is blinking push the Down arrow temperature adjustment button and the UP arrow temperature adjustment button at the same time Number of the display of the remote control will stop blinking Push the UP or Down button to set...

Page 35: ...may not function properly NOTICE If the water heater is installed less than 3 280 feet 1 000m no action is required How to adjust the DIP switch on the PCB for high altitude installation Check the altitude above sea level where the water heater is installed If the altitude is more than 3 280 feet 1 000m the adjustment of DIP switch is required Turn off the gas shut off valve and water shutoff valv...

Page 36: ...attic the hard wired carbon monoxide detector with alarm and battery back up may be installed on the next adjacent floor level b In the event that the requirements of this subdivision can not be met at the time of completion of installation the owner shall have a period of thirty 30 days to comply with the above requirements provided however that during said thirty 30 day period a battery operated...

Page 37: ...n line without the use of a temperature sensor timer or a continuously operating pump All Applicable Warranty Periods will be limited to one 1 year from the Effective Date if the water heater is installed anywhere other than a single family dwelling Commercial Models If the water heater is installed in a commercial application the Applicable Warranty Periods are five 5 years from the Effective Dat...

Page 38: ...ater heater or component part s Paloma will not reimburse any party for these or any other fees not specifically covered in this Limited Warranty document HOW TO OBTAIN WARRANTY CLAIM ASSISTANCE Any claim for warranty assistance must be made promptly First determine if your water heater is In Warranty that is within the Applicable Warranty Period You can determine your unit s warranty status by ad...

Page 39: ...hich the defective part was removed or the date of purchase of the part If it was purchased separately to establish the In warranty status of the defective component part If Paloma determines that the water heater or component part returned to Paloma is free of defects in material and manufacture and or that it was damaged by improper installation the warranty claim for the product component part ...

Page 40: ...Imported by Efficient Technology Sales LLC 5350 Joliet Street Unit 2 Denver CO 80239 USA PRINTED IN USA WA 1109 ...

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